Can Fam Physician. 1981 Apr;27:631-4.
The presence of an isolated midsystolic click and/or late systolic murmur in an otherwise healthy young individual is a totally benign entity and represents a normal variation of mitral valve motion and function. There exists a very small subset of patients with mitral prolapse easily identified by certain clinical characteristics, who have distinct pathologic changes in their mitral valve leaflets and supporting structures. (Can Fam Physician 1981; 27:631-634).
在其他方面健康的年轻个体中出现孤立的收缩中期喀喇音和/或收缩晚期杂音是一种完全良性的现象,代表二尖瓣运动和功能的正常变异。一小部分二尖瓣脱垂患者具有某些特定的临床特征,很容易识别,他们的二尖瓣瓣叶和支持结构有明显的病理变化。(加拿大家庭医生 1981 年;27:631-634)。